This review of the evidence was funded by the Agency for Healthcare Research and Quality (AHRQ) for the U.S. Preventive Services Task Force (USPSTF). The investigators acknowledge the contributions of Kim Villemyer for her help in preparing the full evidence report and the manuscript; Christina Bougatsos for her help in preparing the manuscript; and Andrew Hamilton, M.L.S., M.S., for conducting the literature searches. They also thank Mark Helfand, M.D., M.P.H.; Heidi D. Nelson, M.D., M.P.H.; David Lanier, M.D.; members of the U.S. Preventive Services Task Force; and reviewers for their contributions to this project.
This study was conducted by the Oregon Evidence-based Practice Center under contract to the Agency for Healthcare Research and Quality (AHRQ). Contract No. 290-02-0024, Rockville, MD.
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